question data preprocessing

[Sword-CS]

Even if the same preprocessing method is adopted, why is the number of items in diginetica 42596 instead of 43097.
Because I see that most studies (such as SR-GNN) use the same preprocessing method, the number of items in diginetica is 43097.
Thank you for your attention.

[ZaraYi]

This is because the author limited the max length of the session in DIginetica at 20, while the others do not.